视图控制器容器

inception（启动）

你会在什么时候考虑创建一个自定义视图控制器容器?
Aesthetics（考虑到美观）
自定义应用程序流
您的应用程序直接处理视图层次结构

inception（启动）仅在iPad上

@protocol UISplitViewControllerDelegate
...
// Returns YES if a view controller should be hidden by
// the split view controller in a given orientation.
// (This method is only called on the leftmost view controller
// and only discriminates portrait from landscape.)
- (BOOL)splitViewController: (UISplitViewController*)svc
shouldHideViewController:(UIViewController *)vc
inOrientation:(UIInterfaceOrientation)orientation;
@end

@property(nonatomic,assign) BOOL definesPresentationContext;
// A controller that defines the presentation context can also
// specify the modal transition style if this property is true.
@property(nonatomic,assign) BOOL providesPresentationContextTransitionStyle;